RANKING · 2010 CENSUS · 99 SHOWN OF 99

Largest Scotch-Irish population, Iowa counties · 2010

Iowa counties ranked by the number of residents who are Scotch-Irish ancestry, from the 2010 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 227.

Scotch-Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS –

01Polk County, IAIA516,5466,677–

02Linn County, IAIA232,0283,479–

03Scott County, IAIA175,2592,349–

04Johnson County, IAIA160,0442,150–

05Black Hawk County, IAIA131,5321,925–

06Pottawattamie County, IAIA92,9961,765–

07Story County, IAIA101,2911,269–

08Woodbury County, IAIA106,6491,260–

09Dallas County, IAIA118,457997–

10Jasper County, IAIA38,153875–

11Marshall County, IAIA39,890858–

12Warren County, IAIA57,331844–

13Des Moines County, IAIA38,077824–

14Muscatine County, IAIA41,853645–

15Marion County, IAIA34,192624–

16Webster County, IAIA36,838612–

17Dubuque County, IAIA99,381596–

18Cerro Gordo County, IAIA42,372580–

19Lee County, IAIA32,306562–

20Jones County, IAIA21,253541–

21Wapello County, IAIA35,210540–

22Clinton County, IAIA46,002521–

23Jefferson County, IAIA15,291506–

24Washington County, IAIA22,667496–

25Poweshiek County, IAIA18,368490–

26Henry County, IAIA19,349454–

27Mahaska County, IAIA21,880452–

28Boone County, IAIA26,799445–

29Benton County, IAIA26,004404–

30Sioux County, IAIA36,774370–

31Madison County, IAIA17,270345–

32Hamilton County, IAIA14,944342–

33Mills County, IAIA14,793330–

34Louisa County, IAIA10,416328–

35Plymouth County, IAIA25,697317–

36Page County, IAIA14,856312–

37Cass County, IAIA12,960296–

38Lucas County, IAIA8,847290–

39Appanoose County, IAIA12,077287–

40Union County, IAIA11,829284–

41Tama County, IAIA16,796275–

42Wayne County, IAIA6,738270–

43Cherokee County, IAIA11,369263–

44Wright County, IAIA12,801261–

45Guthrie County, IAIA10,782255–

46Buchanan County, IAIA20,883250–

47Iowa County, IAIA16,504230–

48Bremer County, IAIA25,296228–

49Van Buren County, IAIA7,131228–

50Sac County, IAIA9,525227–

51Carroll County, IAIA20,303224–

52Hardin County, IAIA16,455223–

53Clay County, IAIA16,202218–

54Harrison County, IAIA14,623217–

55Cedar County, IAIA18,359212–

56Floyd County, IAIA14,901212–

57Buena Vista County, IAIA20,449205–

58Greene County, IAIA8,658194–

59Grundy County, IAIA12,361193–

60Dickinson County, IAIA18,077191–

61Fremont County, IAIA6,522183–

62Keokuk County, IAIA9,797183–

63Montgomery County, IAIA10,002183–

64Winneshiek County, IAIA19,733173–

65Kossuth County, IAIA14,322172–

66Shelby County, IAIA11,689167–

67Decatur County, IAIA7,655163–

68Jackson County, IAIA19,288161–

69Butler County, IAIA14,049155–

70Taylor County, IAIA5,835148–

71Franklin County, IAIA9,868133–

72Clayton County, IAIA16,845132–

73Monroe County, IAIA7,406123–

74Calhoun County, IAIA9,562120–

75Humboldt County, IAIA9,409119–

76Fayette County, IAIA19,047117–

77Emmet County, IAIA9,107115–

78Mitchell County, IAIA10,650115–

79Adair County, IAIA7,403114–

80Crawford County, IAIA16,237110–

81Ringgold County, IAIA4,642110–

82Monona County, IAIA8,539103–

83Allamakee County, IAIA14,23896–

84Chickasaw County, IAIA11,66389–

85Winnebago County, IAIA10,25185–

86Hancock County, IAIA10,52884–

87Clarke County, IAIA9,57483–

88Howard County, IAIA9,41580–

89Delaware County, IAIA17,67475–

90Audubon County, IAIA5,50974–

91Davis County, IAIA9,23067–

92O'Brien County, IAIA14,22067–

93Adams County, IAIA3,61766–

94Pocahontas County, IAIA6,81964–

95Palo Alto County, IAIA8,89960–

96Osceola County, IAIA5,98051–

97Worth County, IAIA7,33843–

98Lyon County, IAIA12,35440–

99Ida County, IAIA6,77727–

SHOWING 1–99 OF 99

Download CSV (full list, 99 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS